Listen Technologies UNIVERSAL ANTENNA KIT LA-122 - Manual (Page 16)

12
Setup Instructions
Monopole Antenna Mounting Options
A monopole (single element) antenna may
be mounted to a grounded light box or
junction box in a ceiling or floor using the
Mounting Plate and Mounting Bracket.
BEFORE STARTING, reverse the Antenna
Module on the Mounting Bracket, then install
the Hex Kep nut on the ground post (see
Diagram G at right). The combination of the
Mounting Bracket, nut and your grounded
electrical box provides the required ground
for the antenna.
If you do not have access to a grounded box,
you will need to attach a flexible antenna
element to the ground side of the Antenna
Module (see Diagram I). Be sure to use the
correct length element (longer wire for 72
MHz, shorter one for 216 MHz). Connect the
wire underneath the shorting nut and run
it up into the ceiling.
Mount to a Grounded Electrical Box, Ceiling or
Diagram I. Ceiling mounted monopole with a
flexible antenna attached to provide a ground.
This installation creates a dipole antenna, which
has better performance than a monopole. The
Shorting Plate is not used in this configuration.
Diagram H. Ceiling mounted
monopole with a grounded box.
Diagram G. Reversing the Antenna
Module on the Mounting Bracket
Flexible antenna is used
to provide ground
Hex Kep Nut
Nuts from ground side
of Antenna Module
Ground side of
Antenna Module
Screws from Antenna Module
Ground Plane
Ground side of
Antenna Module
Shorting Plate
Nuts from ground side
of Antenna Module
Hex Kep Nut
Flexible antenna is used
to provide ground
Hex Kep Nut
Nuts from ground side
of Antenna Module
Ground side of
Antenna Module
Screws from Antenna Module
Ground Plane
Ground side of
Antenna Module
Shorting Plate
Nuts from ground side
of Antenna Module
Hex Kep Nut
Ceiling Mount to Electrical
Box.
Invert for floor mount.
(shortening nut required)